Method of treating metals and resulting product



' alone.

Patented June 1, 1943 warren stares parent or ies METHOD OF TREATING METALS AND RESULTING FRQDUC'H.

Christopher Luckhaupt, Jamaica, N. Y., assignor to Henry J. Lucke, East Orange, N. 3.

No Drawing. Application November 28, 1941,

Serial No. 426,862

4 Claims.

Treatment of applicable metals with terpin hydrate either alone or with fortifiers is had by subjecting the metals as in a bath formed by rendering fluid the terpin hydrate treatment material by heating the same at or above the melting point of terpin hydrate, to wit, 115 C.

Fortifiers applicable for the treatment of metal, as aforesaid, are triphenyl phosphate, cellulose acetate, ammonium phosphate and ammonium acetate. Such fortifiers may be employed singly or admixed two or more, the proportion by weight of fortifier or fortifiers relative to terpin hydrate varying from 2% to 50% of the former.

One marked characteristic imparted by the treatment of terpin hydrate alone upon steel, copper, brasses, aluminum, cast iron, etc. is the fortifying of the metal against corrosion and other atmospheric eifects, against mild acids including perspiration, in addition thereto of increase of mechanical strengths, increased resistance against surface abrasion, fracturing, etc. and closing of pores or other voids.

When the stated metals are treated with terpin hydrate and triphenyl phosphate, the triphenyl phosphate imparts a greater increase of fiexual strength, as compared when treated with terpin hydrate alone.

The admixture of cellulose acetate as a fortifler serves to impart, additive to the above enhanced characteristics increased mechanical strengths and a skin coating imparting increased resistance against surface abrasion, fracturing, etc. as compared with treatment with terpin hydrate The iortifier ammonium acetate, employed alone or jointly as the fortifying ingredient imparts the additional characteristic of hardness without brittleness, increased tensile strength and has the efiect of a bright dip. The

extent of penetration of the terpin hydrate treatment material into the metal is determined by the percentage of void, 1. e. porosity of the metal treated, the period of time of treatment and degree of temperature of treatment, the increase in value of the stated factors serving to increase the extent of penetration and vice versa.

I claim:

l. The method of improving the normal characteristics of metal selected from the group consisting of steel, cast iron, aluminum, copper and brasses which comprises subjecting the same to the action of terpin hydrate at or above the temperature of 115 C.

2. The method of improving the normal charactcristics of metal selected from the roup conall.

sisting of steel, cast iron, aluminum, copper and brasses and one or more fortifiers selected from the group consisting of triphenyl phosphate,- celiulose acetate, ammonium phosphate and ammonium acetate, which comprises subjecting the same to the action of terpin hydrate treatment material at or above the temperature of 115 C., 1

the proportion by weight of the fortifying ingredient varying from 2% to relative to the weight of terpin hydrate.

3. The metal having improved characteristics, said metal being selected from the roup'consisting of steel, cast iron, aluminum, copper and brasses and having terpin hydrate impregnated in the pores thereof.

4. The method of improving the normal characteristics of metal selected from the group consisting of steel, cast iron, aluminum, copper and brasses having terpin hydrate and afortifler selected from the group consisting of triphenyl phosphate, cellulose acetate, ammonium phosphate and ammonium acetate which comprises subjecting the same to the action of terpin hydrate treatment material at or above the temperature of C., the proportion by weight of the fortifier ingredient varying from 2% to 50% relative to the weight of terpin hydrate.

CHRISTOPHER. LUCKHAUPT. 

